KR20240072054A - R-t-b계 소결 자석 - Google Patents
R-t-b계 소결 자석 Download PDFInfo
- Publication number
- KR20240072054A KR20240072054A KR1020230153616A KR20230153616A KR20240072054A KR 20240072054 A KR20240072054 A KR 20240072054A KR 1020230153616 A KR1020230153616 A KR 1020230153616A KR 20230153616 A KR20230153616 A KR 20230153616A KR 20240072054 A KR20240072054 A KR 20240072054A
- Authority
- KR
- South Korea
- Prior art keywords
- phase
- atomic
- sintered magnet
- rtb
- grain boundary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 8
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 42
- 239000000203 mixture Substances 0.000 claims description 25
- 239000002245 particle Substances 0.000 claims description 20
- 229910052760 oxygen Inorganic materials 0.000 claims description 17
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 15
- 229910052718 tin Inorganic materials 0.000 claims description 14
- 229910052738 indium Inorganic materials 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 9
- 229910052732 germanium Inorganic materials 0.000 claims description 8
- 229910052787 antimony Inorganic materials 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052793 cadmium Inorganic materials 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 229910052737 gold Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052753 mercury Inorganic materials 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910052797 bismuth Inorganic materials 0.000 claims description 5
- 229910052804 chromium Inorganic materials 0.000 claims description 5
- 229910052735 hafnium Inorganic materials 0.000 claims description 5
- 229910052745 lead Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 229910052758 niobium Inorganic materials 0.000 claims description 5
- 229910052715 tantalum Inorganic materials 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 229910052720 vanadium Inorganic materials 0.000 claims description 5
- 229910052726 zirconium Inorganic materials 0.000 claims description 5
- 229910000765 intermetallic Inorganic materials 0.000 claims description 3
- 229910020813 Sn-C Inorganic materials 0.000 claims description 2
- 229910018732 Sn—C Inorganic materials 0.000 claims description 2
- 229910052733 gallium Inorganic materials 0.000 abstract description 4
- 229910052779 Neodymium Inorganic materials 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 163
- 239000002994 raw material Substances 0.000 description 33
- 229910045601 alloy Inorganic materials 0.000 description 29
- 239000000956 alloy Substances 0.000 description 29
- 238000010438 heat treatment Methods 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 27
- 230000008569 process Effects 0.000 description 26
- 230000007423 decrease Effects 0.000 description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 21
- 238000001514 detection method Methods 0.000 description 21
- 239000000843 powder Substances 0.000 description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 13
- 239000001301 oxygen Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 239000000314 lubricant Substances 0.000 description 12
- 238000001816 cooling Methods 0.000 description 11
- 238000005245 sintering Methods 0.000 description 11
- 230000015572 biosynthetic process Effects 0.000 description 10
- 238000000227 grinding Methods 0.000 description 10
- 239000012298 atmosphere Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 238000005266 casting Methods 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 229910052692 Dysprosium Inorganic materials 0.000 description 5
- 229910052771 Terbium Inorganic materials 0.000 description 5
- 238000002149 energy-dispersive X-ray emission spectroscopy Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 5
- 238000001556 precipitation Methods 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 150000002910 rare earth metals Chemical class 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 229910017061 Fe Co Inorganic materials 0.000 description 3
- 235000021355 Stearic acid Nutrition 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 235000019241 carbon black Nutrition 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 3
- 238000000265 homogenisation Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000001247 metal acetylides Chemical class 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 239000008117 stearic acid Substances 0.000 description 3
- 238000000177 wavelength dispersive X-ray spectroscopy Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 229910052777 Praseodymium Inorganic materials 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000002003 electron diffraction Methods 0.000 description 2
- 238000000635 electron micrograph Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- -1 M 3 compound Chemical class 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical group [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000005324 grain boundary diffusion Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000007578 melt-quenching technique Methods 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0273—Imparting anisotropy
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Heat Treatment Of Articles (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPJP-P-2022-183378 | 2022-11-16 | ||
| JP2022183378A JP2024072521A (ja) | 2022-11-16 | 2022-11-16 | Ｒ－ｔ－ｂ系焼結磁石 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20240072054A true KR20240072054A (ko) | 2024-05-23 |
Family
ID=88505266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020230153616A Pending KR20240072054A (ko) | 2022-11-16 | 2023-11-08 | R-t-b계 소결 자석 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20240161952A1 (fr) |
| EP (1) | EP4372768A1 (fr) |
| JP (1) | JP2024072521A (fr) |
| KR (1) | KR20240072054A (fr) |
| CN (1) | CN118053643A (fr) |
| CA (1) | CA3219212A1 (fr) |
| MX (1) | MX2023013581A (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130522A (ja) | 1993-11-08 | 1995-05-19 | Tdk Corp | 永久磁石の製造方法 |
| JP2015119132A (ja) | 2013-12-20 | 2015-06-25 | Tdk株式会社 | 希土類磁石 |
| JP2017228771A (ja) | 2016-06-20 | 2017-12-28 | 信越化学工業株式会社 | Ｒ−Ｆｅ−Ｂ系焼結磁石及びその製造方法 |
| JP2018125445A (ja) | 2017-02-02 | 2018-08-09 | 日立金属株式会社 | Ｒ−ｔ−ｂ系焼結磁石 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1562203A4 (fr) * | 2003-03-12 | 2009-08-05 | Hitachi Metals Ltd | Aimant fritte r-t-b et son procede de production |
| EP3179487B1 (fr) * | 2015-11-18 | 2021-04-28 | Shin-Etsu Chemical Co., Ltd. | Aimant fritté r (fe-co)-b aux terres rares et procédé de fabrication |
-
2022
- 2022-11-16 JP JP2022183378A patent/JP2024072521A/ja active Pending
-
2023
- 2023-10-19 EP EP23204597.1A patent/EP4372768A1/fr active Pending
- 2023-10-26 US US18/494,864 patent/US20240161952A1/en active Pending
- 2023-11-01 CA CA3219212A patent/CA3219212A1/fr active Pending
- 2023-11-08 KR KR1020230153616A patent/KR20240072054A/ko active Pending
- 2023-11-14 CN CN202311507979.7A patent/CN118053643A/zh active Pending
- 2023-11-15 MX MX2023013581A patent/MX2023013581A/es unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07130522A (ja) | 1993-11-08 | 1995-05-19 | Tdk Corp | 永久磁石の製造方法 |
| JP2015119132A (ja) | 2013-12-20 | 2015-06-25 | Tdk株式会社 | 希土類磁石 |
| JP2017228771A (ja) | 2016-06-20 | 2017-12-28 | 信越化学工業株式会社 | Ｒ−Ｆｅ−Ｂ系焼結磁石及びその製造方法 |
| JP2018125445A (ja) | 2017-02-02 | 2018-08-09 | 日立金属株式会社 | Ｒ−ｔ−ｂ系焼結磁石 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024072521A (ja) | 2024-05-28 |
| CN118053643A (zh) | 2024-05-17 |
| MX2023013581A (es) | 2024-05-17 |
| CA3219212A1 (fr) | 2024-05-16 |
| US20240161952A1 (en) | 2024-05-16 |
| EP4372768A1 (fr) | 2024-05-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 20231108 |
|
| PG1501 | Laying open of application |